| Green hydrogen
Black & Veatch selected for Texas FEED study, 9000 t/y, 60 MW plant
Verdagy has selected Black & Veatch as the FEED contractor for its 60 MW clean hydrogen project near the Gulf Coast in Texas.
The planned production capacity is
Figure 3. Verdagy’s advanced single cell architecture allows every cell in the plant to be individually monitored and serviced, enabling optimum operation and performance guarantees, while also eliminating stack replacements and achieving significantly lower operating costs. Source: Verdagy
In addition, each individual cell is digitally monitored and can be field upgraded to offer continuously improving performance and electrical conversion efficiency. While all other hydrogen electrolysers suffer from annual degradations in performance that lead to significant increases in annual energy expenses, Verdagy’s electrolysers are capable of providing annual performance improvements that significantly reduce annual energy costs, the single largest operating expense in a hydrogen electrolysis plant.
Verdagy’s electrolysers thus offer the lowest levelised cost of hydrogen (LCOH), high reliability, low installation and construction costs, maximum operating flexibility, and among the smallest footprints.
Verdagy’s Dynamic AWE electrolysers are able to provide maximum flexibility and direct coupling with renewable sources due to low gas crossover throughout the entire operating range (see Figure 5).
Traditional AWE and PEM systems suffer from unsafe amounts of gas crossover (above 2% hydrogen to oxygen (HTO)) as the load is reduced, which limits the total operating range and requires full shutdown when not enough power
more than 9000 tons/year of clean hydrogen, with a targeted FEED completion in May 2025 and final investment decision in July 2025. The project plans to use Verdagy’s Dynamic AWE electrolysers, which can match the ERCOT grid in real time to improve grid resilience and maximise hydrogen production. The hydrogen will be both RFNBO (Renewable Fuels of Non-Biological Origin) compliant, meeting European RED III requirements, and 45V compliant, meeting US Treasury requirements, with Verdagy’s electrolysers designed and manufactured in the USA.
2 MW Verdagy Dynamic AWE electrolyser (photo: Verdagy)
is available. Altering the operating conditions and components can limit the gas crossover for these systems, but with the sacrifice of efficiency. As systems move towards thinner membranes in the hope of improving cell efficiency, this only increases the amount of gas crossover. Gas recombination layers are being explored to combat unsafe amounts of gas crossover; however, this requires additional catalyst costs and reduces the amount of hydrogen produced. In contrast, Verdady’s Dynamic AWE electrolysers can safely operate without sacrificing efficiency or requiring additional measures. The low gas crossover not only makes the system safe, but lower gas crossover also increases the purity and production rates of hydrogen.
Fastest path to parity In summary, Dynamic AWE electrolysers can be characterised as combining the reliability, robustness and low-cost materials of
construction of traditional AWE systems with the fast responsiveness and wider dynamic range of PEM systems, while designing out the disadvantages of both. Verdagy’s Dynamic AWE electrolysers use single-cell architecture to virtually eliminate loss of efficiency from degradation and shunt currents. In addition, Verdagy’s dynamic AWE electrolysers are also the only electrolysers in the world today that can achieve improved performance after being installed. Other electrolysers degrade each year. This combination provides plant owners with the lowest LCOH coupled with the assurance that they will always have state-of-the-art performance, and the fastest path to fossil parity costs.
Reference: 1
Thomas H. McWaid, CTO, Verdagy, COMSOL lumped element analysis, 2025
Figure 4. Verdagy’s Dynamic AWE electrolysers enable continuous performance improvements post-installation, leading to the lowest energy and operating expenses for hydrogen electrolysis plants. Source: Verdagy white paper, Dynamic Alkaline Water Electrolysis, the pathway to hydrogen achieving fossil fuel cost parity
Figure 5. Gas crossover vs load for various water electrolysis technologies. Verdagy’s Dynamic AWE maintains low gas crossover throughout entire load range, enabling safe production of hydrogen gas with high purity. HTO = hydrogen to oxygen. Source: Verdagy white paper, Dynamic Alkaline Water Electrolysis, the pathway to hydrogen achieving fossil fuel cost parity
www.modernpowersystems.com | April 2025 | 33
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